Malicious PDF — malware analysis report

Static analysis result for SHA-256 65dba51a9734e2c5…

MALICIOUS

PDF

78.3 KB Created: 2021-05-11 19:51:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f972c65193d2785e5cdd6a489f540fff SHA-1: ba85a67f0195dc10e95dd40a63d22a237303922c SHA-256: 65dba51a9734e2c51744a261d2d8b5121b3c90f846be10f382a29bf43a4f0220
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though partially corrupted, suggests a lure related to a common household problem to entice clicks on the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://zajinet.ru/strik?utm_term=why+is+my+bobbin+winding+loosely
    • http://vatidenow.medianewsonline.com/achievement_motivation_scale_by_deo_mohan.pdf
    • https://cdn.sqhk.co/jesuzedavoti/jciehbR/zemozezowiseponolutivino.pdf
    • http://tuderoba.getenjoyment.net/letra_del_himno_nacional_mexicano_escolar.pdf
    • https://cdn.sqhk.co/muvasesuru/csUmih3/first_strike_final_hour_apk_2._0._7.pdf
    • https://cdn.sqhk.co/ludibipimilu/hco5Phg/chinese_checkers_2_player_rules.pdf
    • https://cdn.sqhk.co/bixatavafut/ngjihO0/kontrapunkt_musik_bedeutung.pdf
    • https://cdn.sqhk.co/numokafas/fihbgdk/chakra_singing_bowls_near_me.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/cadd45c9-0864-46bc-b5c0-7745b14148b3/does_progressive_drug_test_claims_adjuster.pdf
    • https://s3.amazonaws.com/gitipelut/kaleidagraph_windows_free.pdf
    • https://s3.amazonaws.com/lodazojamuva/the_lottery_by_shirley_jackson_story_summary.pdf
    • http://renumobopus.rf.gd/modaradanenodamiboj.pdf
    • https://s3.amazonaws.com/buganabowumujef/2009_cadillac_escalade_hybrid_manual.pdf
    • https://s3.amazonaws.com/zebarufuridorur/english_speaking_classes_online_india.pdf
    • https://uploads.strikinglycdn.com/files/e059927e-3625-41ac-8b83-49220d7de6eb/chess_puzzles_mate_in_two.pdf
    • https://uploads.strikinglycdn.com/files/132a2894-eab2-4000-8982-4d8596abbc18/56204656666.pdf
    • https://22520ec4-2132-45a5-98b8-54db1b71d3ea.filesusr.com/ugd/b33b96_442bb575335a4dffa088996262f6f06f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/eb9378c6-5ac4-46a5-8f75-472406a2e8a9/what_is_the_largest_self_propelled_lawn_mower.pdf
    • https://1482387f-61d8-47e1-b538-9b7f1e8b89fb.filesusr.com/ugd/538d67_9802810970854e85b9a6012d45faf4d9.pdf?index=true
    • http://nilubipaviwi.rf.gd/lapakoladasumuf.pdf
    • https://f4b9ed98-44c1-44e6-9966-d9817cd43de7.filesusr.com/ugd/9ced5d_f9288f0f2a9c42dc85ca4160e794a694.pdf?index=true
    • http://sajanigikedu.epizy.com/12411954221.pdf
    • https://uploads.strikinglycdn.com/files/c327c166-f151-4fba-a826-9f980e5e0ae3/cuantos_milimetros_hay_en_1_kilometro.pdf
    • http://texuvana.rf.gd/buku_akuntansi_sektor_publik_mardiasmo.pdf
    • https://d6236f05-450e-4b96-9875-1783d83c708b.filesusr.com/ugd/912de2_080ef108009748aba06f39e9c111643a.pdf?index=true
    • https://6d706a39-1f93-4f1a-9423-caccf7e65e71.filesusr.com/ugd/69f91f_5290c78c339741d48a296af2a1bf2519.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4c5.bin
974f53ca4970aead2032db1adc5c141cdc2fa149f37b83cfc904387207e8d447		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C5 5280 bytes
font_01_sfnt_off000106b7.bin
c924f1eb50da281bed99ffbcc9186efbe1ae1e3bbdf690559fc89e11a7a9cd86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106B7 10328 bytes

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